Respirator mask body



FIG. 1 is a perspective view, showing the new design for a respirator mask body;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view, the left side view being a mirror image thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view.

The broken line showing forms no part of the claimed design. 

CLAIM The ornamental design for a respirator mask body, as shown and described. 